INTERCHANGEABLE LENS ADAPTABLE TO A CAMERA OR PHOTOGRAPHIC SHUTTER, WITH BUILT-IN SECTOR SYSTEM

The invention is related to a sector system capable of providing lens elements of different aperture held in different support means. Exposure of a film through the lens is determined by the opening and closing of a sector plate system and the time and extent of opening and closing is appropriately...

Ausführliche Beschreibung

Gespeichert in:

Bibliographische Detailangaben
Hauptverfasser:	STARP, FRANZ W. R
Format:	Patent
Sprache:	eng
Schlagworte:	ACCESSORIES THEREFOR APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USINGWAVES OTHER THAN OPTICAL WAVES APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FORPROJECTING OR VIEWING THEM CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY PHOTOGRAPHY PHYSICS
Online-Zugang:	Volltext bestellen
Tags:	Tag hinzufügen Keine Tags, Fügen Sie den ersten Tag hinzu!

Beschreibung
Zusammenfassung:	The invention is related to a sector system capable of providing lens elements of different aperture held in different support means. Exposure of a film through the lens is determined by the opening and closing of a sector plate system and the time and extent of opening and closing is appropriately controlled by changing the position of the drive means relative to the lens forming means. In this way the sector plates for exposing the camera film to light passing through the lens travel different distances which depend upon the light aperture required in order that the exposure shall be consistent with the lens aperture and its speed and at least approximately equal to the overlap and overswing phases of the sector system.